Definition Cerclage, or surgical reinforcement of the cervix, is primarily used to prevent preterm birth in patients with cervical insufficiency. Cerclage is most often performed transvaginally, either the McDonald or the more invasive Shirdokar (Antiseptic 1955;52:299), though transabdomianl cerclage can be performed if there is insufficient cervical tissue for transvaginal cerclage or if prior transvaginal […]